18061306 has 4 divisors (see below), whose sum is σ = 27091962. Its totient is φ = 9030652.

The previous prime is 18061297. The next prime is 18061319. The reversal of 18061306 is 60316081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17850625 + 210681 = 4225^2 + 459^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4515325 + ... + 4515328.

Almost surely, 2^18061306 is an apocalyptic number.

18061306 is a deficient number, since it is larger than the sum of its proper divisors (9030656).

18061306 is an equidigital number, since it uses as much as digits as its factorization.

18061306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9030655.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 18061306 is about 4249.8595270903. The cubic root of 18061306 is about 262.3713340717.

Adding to 18061306 its reverse (60316081), we get a palindrome (78377387).

The spelling of 18061306 in words is "eighteen million, sixty-one thousand, three hundred six".